CN202691260U - Pilot pedal valve and excavator - Google Patents
Pilot pedal valve and excavator Download PDFInfo
- Publication number
- CN202691260U CN202691260U CN 201220360135 CN201220360135U CN202691260U CN 202691260 U CN202691260 U CN 202691260U CN 201220360135 CN201220360135 CN 201220360135 CN 201220360135 U CN201220360135 U CN 201220360135U CN 202691260 U CN202691260 U CN 202691260U
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- Prior art keywords
- guide
- foot
- link
- foot valve
- attachment hole
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- Expired - Fee Related
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Abstract
The utility model discloses a pilot pedal valve, comprising a pedal plate (1), a base (2) and a regulating device (3), wherein the pedal plate (1) is rotatably connected onto the base (2); and the regulating device (3) is connected between the pedal plate (1) and the base (2) and capable of switching between a fastening state and a movable state, so that the pedal plate (1) can be fixed with the base (2) or can rotate relative to the base (2). According to the pilot pedal valve disclosed by the utility model, the pedal plate can freely switch between the fastening state and a working state, so that safety accidents caused by misoperations of operators are prevented.
Description
Technical field
The utility model relates to engineering machinery field, particularly, relates to a kind of guide's foot valve and excavator.
Background technique
Usually, excavator comprises (such as quartering hammer, hydraulic shear etc.) such as equipment, traveling gear, engine power system, hydraulic system, hydraulic servicess.Hydraulic services can be expanded the function of excavator so that excavator not only can excavation, lifting, entrucking, and can crushed stone by changing different hydraulic servicess, cut off reinforcing bar, material grasping etc.Take pipeline that quartering hammer is installed as example, the hydraulic system of quartering hammer comprises working connection and oil circuit control, in the action of oil circuit control by pilot valve controlled fragmentation hammer.
Figure 1 shows that the structural representation of foot treadle of the excavator of prior art, Figure 2 shows that the schematic diagram of oil circuit control of the quartering hammer of prior art.Foot treadle 1 is hinged on the base 2, and base 2 is installed on the floor 7.Because quartering hammer is one action, from the oil inlet P oil-feed, the oil return inlet T oil return gets final product to only have an actuator port (the first actuator port A) when namely working, and they are different from common dual action cylinder, and oil cylinder has two actuator ports.Therefore, in the process that quartering hammer uses, the operator only need to apply to the front portion of foot treadle 1 the first directed force F 1, and then the actuator port A pressure oil output of pilot valve 8 so that quartering hammer moves, is worked thereby carry out fragmentation.
When not needing quartering hammer work, pilot valve 8 is in meta, and foot treadle 1 in the raw simultaneously.But, since foot treadle under nature without controlling device, limited by the cab space of excavator, misoperation easily occurs in the operator, for example foot fault is placed on the foot treadle and has a rest, and causes the misoperation of quartering hammer, causes serious consequence, brings potential safety hazard.
The model utility content
The purpose of this utility model provides a kind of guide's foot valve and excavator, and this guide's foot valve can be realized the tightening state of foot treadle and freely switching of working state, prevents that operator's misoperation from causing security incident.
To achieve these goals, one side of the present utility model provides a kind of guide's foot valve, this guide's foot valve comprises foot treadle and base, this foot treadle is connected on the described base rotationally, wherein, this guide's foot valve also comprises controlling device, and this controlling device is connected between described foot treadle and the described base and can switches between tightening state and active state, so that described foot treadle can be fixed with described base or rotate with respect to described base.
Preferably, described controlling device comprises adjusting element and link, and described adjusting element is connected to the below of the front portion of described foot treadle, and described link is connected with described base, and described adjusting element removably is connected with described link.
Preferably, described controlling device comprises locating stud, the lower end of described adjusting element is formed with the first adjustment hole, the upper end of described link is formed with first attachment hole corresponding with described the first adjustment hole, described locating stud passes described the first adjustment hole and described the first attachment hole setting, removably to connect described adjusting element and described link.
Preferably, the lower end of described adjusting element also is formed with the second adjustment hole, the upper end of described link is formed with second attachment hole corresponding with described the second adjustment hole, described locating stud passes described the second adjustment hole and described the second attachment hole setting and can move in described the second adjustment hole, so that described adjusting element can be with respect to described link motion.
Preferably, described the second adjustment hole is waist shaped hole, and the lower end of this waist shaped hole and described the first adjustment hole are positioned at the sustained height position.
Preferably, the middle part of described link also is formed with the 3rd attachment hole, and described locating stud can pass described the 3rd attachment hole setting.
Preferably, described link comprises two connecting plates that relatively be arranged in parallel, and the lower end of described adjusting element is arranged between described two connecting plates.
Preferably, the shape of described the first attachment hole, described the second attachment hole and described the 3rd attachment hole is identical and have respectively two straight flanges that relatively be arranged in parallel and two arc-shaped edges that are oppositely arranged, the two ends of described locating stud have respectively the first blocked part and the second blocked part, the diameter of described the first blocked part is greater than the diameter of described the first attachment hole, and the shape of the shape of described the second blocked part and described the first attachment hole is complementary.
Preferably, described link comprises mounting plate, and this mounting plate is connected to the lower end of described connecting plate.
Of the present utility modelly provide on the other hand a kind of excavator, this excavator comprises guide's foot valve, and wherein, this guide's foot valve is guide's foot valve recited above.
Pass through technique scheme, leading in the ban foot valve does not need to export when controlling oil, the actuator port that is pilot valve does not need pressure oil output, pilot valve is in meta, and hydraulic services does not need action, and then foot treadle in the raw, do not need it is applied any external force, at this moment, controlling device is fastened on foot treadle on the base, prevents that foot treadle is subject to External Force Acting and rotates.Leading in the ban foot valve need to export when controlling oil, the actuator port that is pilot valve needs pressure oil output, pilot valve is in connected state, hydraulic services needs execution action, then foot treadle need to be so that the pilot valve connection under the effect of the first active force or the second active force, at this moment, controlling device does not have restriction to foot treadle, and foot treadle can rotate under external force.Therefore, this guide's foot valve can be regulated according to the different needs under each working state, so that foot treadle is in tightening state or active state, thereby the misoperation that can avoid operator causes the hydraulic services actions such as pilot valve controlled fragmentation hammer, improves the operating security of guide's foot valve.
Other feature and advantage of the present utility model will partly be described in detail in embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide further understanding of the present utility model, and consists of the part of specification, is used from explanation the utility model with following embodiment one, but does not consist of restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the side view of guide's foot valve of prior art;
Fig. 2 is the schematic diagram of pilot valve of guide's foot valve of prior art;
Fig. 3 is the side view of guide's foot valve of the present utility model;
Fig. 4 is the plan view of the adjusting element of guide's foot valve of the present utility model;
Fig. 5 is the stereogram of the link of guide's foot valve of the present utility model;
Fig. 6 is the partial enlarged drawing of the link of guide's foot valve of the present utility model;
Fig. 7 is the stereogram of the locating stud of guide's foot valve of the present utility model;
Fig. 8 is the partial enlarged drawing of guide's foot valve of the present utility model; And
Fig. 9 is the schematic diagram of the pilot valve of guide's foot valve of the present utility model.
Description of reference numerals
1 foot treadle, 2 bases
3 controlling devices, 4 adjusting elements
5 links, 6 locating studs
7 floors, 8 pilot valves
41 first adjustment holes, 42 second adjustment holes
51 first attachment holes, 52 second attachment holes
53 the 3rd attachment holes, 54 connecting plates
55 mounting plates, 61 first blocked parts
62 second blocked parts
F1 the first directed force F 2 second active forces
P filler opening T return opening
A the first actuator port B the second actuator port
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated.Should be understood that, embodiment described herein only is used for description and interpretation the utility model, is not limited to the utility model.
In the utility model, in the situation that do opposite explanation, the noun of locality of use typically refers to as shown in Figure 3 short transverse such as " up and down ", and " front and back " typically refer to length direction as shown in Figure 3.
As shown in Figure 3, one side of the present utility model provides a kind of guide's foot valve, this guide's foot valve comprises foot treadle 1 and base 2, this foot treadle 1 is connected on the described base 2 rotationally, wherein, this guide's foot valve also comprises controlling device 3, and this controlling device 3 is connected between described foot treadle 1 and the described base 2 and can switches between tightening state and active state, so that described foot treadle 1 can be fixed with described base 2 or rotate with respect to described base 2.
Leading in the ban foot valve does not need to export when controlling oil, the actuator port A, the B that are pilot valve 8 do not need pressure oil output, pilot valve 8 is in meta, hydraulic services does not need action, then foot treadle 1 does not need it is applied any external force, at this moment in the raw, controlling device 3 is fastened on foot treadle 1 on the base 2, prevents that foot treadle 1 is subject to External Force Acting and rotates.Leading in the ban foot valve need to export when controlling oil, the actuator port A, the B that are pilot valve 8 need pressure oil output, pilot valve 8 is in connected state, hydraulic services needs execution action, then foot treadle 1 need to be so that pilot valve 8 connections under the effect of the first directed force F 1, at this moment, 3 pairs of foot treadles 1 of controlling device do not have restriction, and foot treadle 1 can rotate under external force.Therefore, this guide's foot valve can be regulated according to the different needs under each working state, so that foot treadle 1 is in tightening state or active state, thereby the misoperation that can avoid operator causes the hydraulic services actions such as pilot valve 8 controlled fragmentation hammers, improves the operating security of guide's foot valve.
Wherein, in order to expand the use function of excavator, excavator uses the double-action hydraulic annexes such as hydraulic shear, grab bucket, correspondingly, as shown in Figure 9, pilot valve 8 can adopt have two actuator ports pilot valve of (i.e. the first actuator port A and the second actuator port B), so that two kinds of hydraulic services different actions are correspondingly controlled.Simultaneously, foot treadle 1 is applied the first directed force F 1 or the second directed force F 2, can realize the output control to the first actuator port A or the second actuator port B of pilot valve 8.
Certainly, guide's foot valve of the present utility model also is applicable to single hydraulic services, and pilot valve 8 can adopt the pilot valve of (i.e. the first actuator port A) that only has an actuator port or the pilot valve (one of them actuator port is in cut-off state) with two actuator ports (i.e. the first actuator port A and the second actuator port B) all can.
As a kind of mode of execution of the present utility model, as shown in Figure 3-Figure 5, preferably, described controlling device 3 comprises adjusting element 4 and link 5, described adjusting element 4 is connected to the below of the front portion of described foot treadle 1, described link 5 is connected with described base 2, and described adjusting element 4 removably is connected with described link 5.
Adjusting element 4 can be fixed on by fastening piece the front portion of foot treadle 1, also can directly be welded on the front portion of foot treadle 1.Link 5 is fixedly connected on the base 2, and adjusting element 4 can removably be connected by fastening piece etc. with link 5.Therefore, when adjusting element 4 was fixedly connected with link 5, controlling device 3 was in tightening state, and foot treadle 1 can not rotate; When adjusting element 4 was not connected with link 5, controlling device 3 was in active state, and foot treadle 1 can rotate.
In order to make things convenient for removably connecting of adjusting element 4 and link 5, as shown in Figure 3-Figure 5, preferably, described controlling device 3 comprises locating stud 6, the lower end of described adjusting element 4 is formed with the first adjustment hole 41, the upper end of described link 5 is formed with first attachment hole 51 corresponding with described the first adjustment hole 41, and described locating stud 6 passes described the first adjustment hole 41 and described the first attachment hole 51 arranges, removably to connect described adjusting element 4 and described link 5.
Adopt ground for convenience detach locating stud 6 to realize removably connecting of adjusting element 4 and link 5, and be formed with respectively the first adjustment hole 41 and the first attachment hole 51 that are complementary on adjusting element 4 and the link 5, locating stud 6 is arranged in the first adjustment hole 41 and the first attachment hole 51 and realizes tightening state, and locating stud 6 splits out rear realization active state.
When the hydraulic servicess such as one action quartering hammer are installed when excavator, as shown in Figure 3-Figure 5, preferably, the lower end of described adjusting element 4 also is formed with the second adjustment hole 42, the upper end of described link 5 is formed with second attachment hole 52 corresponding with described the second adjustment hole 42, described locating stud 6 passes described the second adjustment hole 42 and described the second attachment hole 52 and arranges and can move in described the second adjustment hole 42, so that described adjusting element 4 can move with respect to described link 5.
Under tightening state, locating stud 6 is arranged in the first adjustment hole 41 and the first attachment hole 51; Under active state, locating stud 6 takes apart and is arranged in the second adjustment hole 42 and the second attachment hole 52 from the first adjustment hole 41 and the first attachment hole 51.When the front portion to foot treadle 1 applied the first directed force F 1, adjusting element 4 moved downward with respect to link 5, and locating stud 6 can slide in the second adjustment hole 42, thereby realized the output control to the first actuator port A pressure oil of pilot valve 8.
When in order to eliminate excavator the hydraulic servicess such as one action quartering hammer being installed, rear portion to foot treadle 1 applies the second directed force F 2 and the invalid action of generation, as shown in Figure 3-Figure 5, preferably, described the second adjustment hole 42 is waist shaped hole, and the lower end of this waist shaped hole and described the first adjustment hole 41 are positioned at the sustained height position.Under active state, when the rear portion to foot treadle 1 applies the second directed force F 2, because lower end and first adjustment hole 41 of waist shaped hole are positioned at the sustained height position, locating stud 6 can not slide in the second adjustment hole 42, adjusting element 4 can not move upward, then the action of foot treadle 1 is restricted and invalid action can not occur, thereby realizes the output control to the second actuator port B pressure oil of pilot valve 8.The second adjustment hole 42 for example is roughly the shape of the waist shaped hole of arc for the movement locus with adjusting element 4 adapts, thereby locating stud 6 can level and smooth motion in the second adjustment hole 42, avoids being subject to resistance or restriction.
When realizing that excavator is installed the hydraulic servicess such as scraper bowl of two actions, freely moving of foot treadle 1 is such as Fig. 3 and shown in Figure 5, preferably, the middle part of described link 5 also is formed with the 3rd attachment hole 53, and described locating stud 6 can pass described the 3rd attachment hole 53 and arrange.When locating stud 6 was arranged in the 3rd attachment hole 53, controlling device 3 was in freely movable state.When the front portion to foot treadle 1 applied the first directed force F 1, corresponding action occured in the first actuator port A of pilot valve 8 output control oil, hydraulic services, such as digging under the scraper bowl etc.; When the rear portion to foot treadle 1 applies the second directed force F 2, the second actuator port B of pilot valve 8 output control oil, corresponding action occurs in hydraulic services, kicks up such as scraper bowl etc.The 3rd attachment hole 53 avoids it to lose as the storage configuration of locating stud 6.
As shown in Figure 5, for the connection that makes things convenient for link 5 to be connected with adjusting element, preferably, described link 5 comprises two connecting plates 54 that relatively be arranged in parallel, and the lower end of described adjusting element 4 is arranged between described two connecting plates 54.On two connecting plates 54, all be formed with the first attachment hole 51, the second attachment hole 52 and the 3rd attachment hole 53 of paired setting, adjusting element 4 is limited between two connecting plates 54, so that under tightening state link 5 are connected with adjusting element connect more firm, and under active state adjusting element 4 because the lateral limitation of 54 pairs of adjusting elements 4 of two connecting plates, thereby adjusting element 4 is also more steady with respect to the motion of link 5.
In order to prevent coming off after locating stud 6 from installing the location, preferably, as shown in Figure 6, the shape of described the first attachment hole 51, described the second attachment hole 52 and described the 3rd attachment hole 53 is identical and have respectively two straight flanges that relatively be arranged in parallel and two arc-shaped edges that are oppositely arranged, as shown in Figure 7, the two ends of described locating stud 6 have respectively the first blocked part 61 and the second blocked part 62, the diameter of described the first blocked part 61 is greater than the diameter of described the first attachment hole 51, and the shape of the shape of described the second blocked part 62 and described the first attachment hole 51 is complementary.
When locating stud 6 is installed, first two straight flanges of relatively be arrangeding in parallel on the second blocked part 62 of locating stud 6 and attachment hole 51,52, two corresponding straight flanges of 53 are alignd, then locating stud 6 just can insert in the attachment hole 51,52,53.When the first blocked part 61 of locating stud 6 with after connecting plate 54 contacts, locating stud 6 is rotated 90 °, as shown in Figure 8, then two of the second blocked part 62 arc-shaped edges and attachment hole 51,52, two straight flanges of 53 are corresponding, locating stud 6 is subject to two blocked parts 61,62 restriction and is positioned in the attachment hole 51,52,53, and be not easy to come off, guaranteed the reliability in the work of guide's foot valve.When needs dismounting locating stud 6, with locating stud 6 half-twists, just can like a cork it be pulled down again.
As shown in Figure 5, in order to make things convenient for the installation of link 5, preferably, described link 5 comprises mounting plate 55, and this mounting plate 55 is connected to the lower end of described connecting plate 5, and particularly, mounting plate 55 is vertical with connecting plate 54.Be formed with mounting hole on the mounting plate 55, mounting plate 55 is positioned at base 2 belows, and is installed on the floor 7 of operator cabin or control cab with base 2 by fastening piece, thereby realizes the fixing of link 5.Whole guide's foot valve is installed on the floor 7 of operator cabin or control cab, and the valve body of pilot valve 8 is usually located at the below on floor 7.
Of the present utility modelly provide on the other hand a kind of excavator, this excavator comprises guide's foot valve, and wherein, this guide's foot valve is guide's foot valve recited above.Because this guide's foot valve can be changed between tightening state and active state, when realizing that hydraulic services is failure to actuate to the fixing of foot treadle and the freely activity of foot treadle when hydraulic services move, thereby improved the Security that excavator uses, the danger of avoiding misoperation to bring.
Below describe by reference to the accompanying drawings preferred implementation of the present utility model in detail; but; the utility model is not limited to the detail in the above-mentioned mode of execution; in technical conceive scope of the present utility model; can carry out multiple simple variant to the technical solution of the utility model, these simple variant all belong to protection domain of the present utility model.
Need to prove in addition, each concrete technical characteristics described in above-mentioned embodiment in reconcilable situation, can make up by any suitable mode, for fear of unnecessary repetition, the utility model is to the no longer separately explanation of various possible compound modes.
In addition, also can carry out combination in any between the various mode of execution of the present utility model, as long as it is without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Claims (10)
1. guide's foot valve, this guide's foot valve comprises foot treadle (1) and base (2), this foot treadle (1) is connected on the described base (2) rotationally, it is characterized in that, this guide's foot valve also comprises controlling device (3), this controlling device (3) is connected between described foot treadle (1) and the described base (2) and can switches between tightening state and active state, so that described foot treadle (1) can be fixed with described base (2) or rotate with respect to described base (2).
2. guide's foot valve according to claim 1, it is characterized in that, described controlling device (3) comprises adjusting element (4) and link (5), described adjusting element (4) is connected to the below of the front portion of described foot treadle (1), described link (5) is connected with described base (2), and described adjusting element (4) removably is connected with described link (5).
3. guide's foot valve according to claim 2, it is characterized in that, described controlling device (3) comprises locating stud (6), the lower end of described adjusting element (4) is formed with the first adjustment hole (41), the upper end of described link (5) is formed with first attachment hole (51) corresponding with described the first adjustment hole (41), described locating stud (6) passes described the first adjustment hole (41) and described the first attachment hole (51) arranges, removably to connect described adjusting element (4) and described link (5).
4. guide's foot valve according to claim 3, it is characterized in that, the lower end of described adjusting element (4) also is formed with the second adjustment hole (42), the upper end of described link (5) is formed with second attachment hole (52) corresponding with described the second adjustment hole (42), described locating stud (6) passes described the second adjustment hole (42) and described the second attachment hole (52) and arranges and can move in described the second adjustment hole (42), so that described adjusting element (4) can move with respect to described link (5).
5. guide's foot valve according to claim 4 is characterized in that, described the second adjustment hole (42) is waist shaped hole, and the lower end of this waist shaped hole and described the first adjustment hole (41) are positioned at the sustained height position.
6. guide's foot valve according to claim 3 is characterized in that, the middle part of described link (5) also is formed with the 3rd attachment hole (53), and described locating stud (6) can pass described the 3rd attachment hole (53) setting.
7. the described guide's foot valve of any one according to claim 2-6, it is characterized in that, described link (5) comprises two connecting plates (54) that relatively be arranged in parallel, and the lower end of described adjusting element (4) is arranged between described two connecting plates (54).
8. guide's foot valve of stating according to claim 6, it is characterized in that, described the first attachment hole (51), the shape of described the second attachment hole (52) and described the 3rd attachment hole (53) is identical and have respectively two straight flanges that relatively be arranged in parallel and two arc-shaped edges that are oppositely arranged, the two ends of described locating stud (6) have respectively the first blocked part (61) and the second blocked part (62), the diameter of described the first blocked part (61) is greater than the diameter of described the first attachment hole (51), and the shape of the shape of described the second blocked part (62) and described the first attachment hole (51) is complementary.
9. described guide's foot valve is characterized in that according to claim 2-6, and described link (5) comprises mounting plate (55), and this mounting plate (55) is connected to the lower end of described connecting plate (5).
10. excavator, this excavator comprises guide's foot valve, it is characterized in that, this guide's foot valve is the described guide's foot valve of any one in according to claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220360135 CN202691260U (en) | 2012-07-24 | 2012-07-24 | Pilot pedal valve and excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220360135 CN202691260U (en) | 2012-07-24 | 2012-07-24 | Pilot pedal valve and excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202691260U true CN202691260U (en) | 2013-01-23 |
Family
ID=47546882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220360135 Expired - Fee Related CN202691260U (en) | 2012-07-24 | 2012-07-24 | Pilot pedal valve and excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202691260U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088868A (en) * | 2013-02-20 | 2013-05-08 | 山重建机(济宁)有限公司 | Novel hydraulic excavator multifunctional auxiliary tool controller |
| CN104820464A (en) * | 2015-05-28 | 2015-08-05 | 江苏柳工机械有限公司 | Foot pedal operating mechanism |
| CN105937651A (en) * | 2016-05-19 | 2016-09-14 | 龙工（上海）精工液压有限公司 | Rotating assembly capable of effectively decreasing stagger amount of foot operated valve |
| CN107964998A (en) * | 2018-01-09 | 2018-04-27 | 徐州徐工挖掘机械有限公司 | A kind of multi-functional pilot control rides valve system and its application method |
| CN108990418A (en) * | 2017-03-31 | 2018-12-11 | 日立建机株式会社 | Engineering machinery |
-
2012
- 2012-07-24 CN CN 201220360135 patent/CN202691260U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088868A (en) * | 2013-02-20 | 2013-05-08 | 山重建机(济宁)有限公司 | Novel hydraulic excavator multifunctional auxiliary tool controller |
| CN104820464A (en) * | 2015-05-28 | 2015-08-05 | 江苏柳工机械有限公司 | Foot pedal operating mechanism |
| CN105937651A (en) * | 2016-05-19 | 2016-09-14 | 龙工（上海）精工液压有限公司 | Rotating assembly capable of effectively decreasing stagger amount of foot operated valve |
| CN105937651B (en) * | 2016-05-19 | 2018-06-19 | 龙工（上海）精工液压有限公司 | A kind of rotating assembly for effectively reducing foot valve offset |
| CN108990418A (en) * | 2017-03-31 | 2018-12-11 | 日立建机株式会社 | Engineering machinery |
| CN108990418B (en) * | 2017-03-31 | 2021-01-05 | 日立建机株式会社 | Construction machine |
| CN107964998A (en) * | 2018-01-09 | 2018-04-27 | 徐州徐工挖掘机械有限公司 | A kind of multi-functional pilot control rides valve system and its application method |
| CN107964998B (en) * | 2018-01-09 | 2023-02-14 | 徐州徐工挖掘机械有限公司 | Multifunctional pilot-operated pedal valve mechanism and using method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130123 Termination date: 20160724 |